dom0 panics when domU writes to disk on NFS

To: port-xen%netbsd.org@localhost
Subject: dom0 panics when domU writes to disk on NFS
From: Alexander Frolkin <avf%eldamar.org.uk@localhost>
Date: Sun, 19 Dec 2010 13:56:47 +0000
Hi,

I'm running a 5.1 dom0 and trying to install a 5.1 domU.  The domU's disk
lives on NFS and whenever domU tries to write to the disk, dom0 panics.

If I move domU's disk to local storage, it works fine.

There was a remarkably similar issue a while ago:

  http://mail-index.netbsd.org/port-xen/2009/10/01/msg005404.html

I've checked my xbdback_xenbus.c and my version (1.20.4.3) includes the
fix produced as a result of that thread.

This is what happens in dom0 when domU tries to write to its disk:

-----
uvm_fault(0xffffffff8069b360, 0x0, 1) -> e
fatal page fault in supervisor mode
trap type 6 code 0 rip ffffffff801df51a cs e030 rflags 10246 cr2  40 cpl 0 rsp 
ffffa00015ae9b40
kernel: page fault trap, code=0
Stopped in pid 0.55 (system) at netbsd:nfs_doio+0x1fa:  cmpq    0x40(%rax),%r15
nfs_doio() at netbsd:nfs_doio+0x1fa
nfssvc_iod() at netbsd:nfssvc_iod+0x185
ds          0x3228
es          0
fs          0x9b80
gs          0
rdi         0xa00013f3d000
rsi         0xffffffff803f9538  nbpd+0x18
rbp         0xffffa00015ae9c40
rbx         0
rdx         0xfbb
rcx         0x2c3228
rax         0
r8          0x1
r9          0
r10         0xffffa00015ae9ad8
r11         0
r12         0xffffa00015ae9b80
r13         0
r14         0x1
r15         0xffffa00016095010
rip         0xffffffff801df51a  nfs_doio+0x1fa
cs          0xe030
rflags      0x10246
rsp         0xffffa00015ae9b40
ss          0xe02b
netbsd:nfs_doio+0x1fa:  cmpq    0x40(%rax),%r15
db> 

$ gdb netbsd.gdb
(gdb) list *(0xffffffff801df51a)
0xffffffff801df51a is in nfs_doio (../../../../nfs/nfs_bio.c:956).
951     #endif
952             rw_enter(&nmp->nm_writeverflock, RW_READER);
953     
954             for (i = 0; i < npages; i++) {
955                     pgs[i] = uvm_pageratop((vaddr_t)bp->b_data + (i << 
PAGE_SHIFT));
956                     if (pgs[i]->uobject == uobj &&
957                         pgs[i]->offset == uiop->uio_offset + (i << 
PAGE_SHIFT)) {
958                             KASSERT(pgs[i]->flags & PG_BUSY);
959                             /*
960                              * this page belongs to our object.
(gdb) 
-----

I also have another domU (FreeBSD HVM) on the same dom0 with the disk set
up in the same way, and this works fine.

Let me know if there is anything else I can do to help.

Thanks!


dom0 dmesg:
-----
Copyright (c) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
    2006, 2007, 2008, 2009, 2010
    The NetBSD Foundation, Inc.  All rights reserved.
Copyright (c) 1982, 1986, 1989, 1991, 1993
    The Regents of the University of California.  All rights reserved.

NetBSD 5.1 (MONAD) #4: Sun Dec 19 13:37:09 GMT 2010
        root@monad:/usr/src/sys/arch/amd64/compile/MONAD
total memory = 256 MB
avail memory = 239 MB
timecounter: Timecounters tick every 10.000 msec
SMBIOS rev. 2.6 @ 0xfcd30 (57 entries)
mainbus0 (root)
mainbus0: scanning 0x9fc00 to 0x9fff0 for MP signature
mainbus0: scanning 0x9f800 to 0x9fbf0 for MP signature
mainbus0: scanning 0xf0000 to 0xffff0 for MP signature
mainbus0: MP floating pointer found in bios at 0xff780
mainbus0: MP config table at 0xfd730, 452 bytes long
cpu0 at mainbus0 apid 0: (boot processor)
cpu1 at mainbus0 apid 1: (application processor)
cpu2 at mainbus0 apid 2: (application processor)
cpu3 at mainbus0 apid 3: (application processor)
cpu4 at mainbus0 apid 4: (application processor)
cpu5 at mainbus0 apid 5: (application processor)
ioapic0 at mainbus0 apid 6: pa 0xfec00000, virtual wire mode, version 21, 24 
pins
hypervisor0 at mainbus0: Xen version 3.3
vcpu0 at hypervisor0: AMD 686-class, 2807MHz, id 0x100fa0
debug virtual interrupt using event channel 1
xenbus0 at hypervisor0: Xen Virtual Bus Interface
xencons0 at hypervisor0: Xen Virtual Console Driver
xencons0: console major 143, unit 0
xencons0: using event channel 2
acpi0 at hypervisor0: Intel ACPICA 20080321
acpi0: X/RSDT: OemId <7599MS,A7599100,20100804>, AslId <MSFT,00000097>
mpacpi: found root PCI bus 0 at level 1
mpacpi: failed to derive bus number, ignoring
mpacpi: failed to derive bus number, ignoring
mpacpi: failed to derive bus number, ignoring
mpacpi: failed to derive bus number, ignoring
mpacpi: found subordinate bus 1 at level 2
mpacpi: failed to derive bus number, ignoring
mpacpi: failed to derive bus number, ignoring
mpacpi: failed to derive bus number, ignoring
mpacpi: failed to derive bus number, ignoring
mpacpi: failed to derive bus number, ignoring
mpacpi: found subordinate bus 2 at level 2
mpacpi: 3 PCI busses
mpacpi: ISA interrupt override 0 -> 2 (0/0)
mpacpi: ISA interrupt override 9 -> 9 (3/3)
mpacpi: configuring PCI bus 0 int routing
mpacpi: configuring PCI bus 1 int routing
mpacpi: configuring PCI bus 2 int routing
ioapic0: pin 2 attached to isa0 irq 0 (type 0<type=0> flags 0<pol=0,trig=0>)
ioapic0: pin 1 attached to isa0 irq 1 (type 0<type=0> flags 0<pol=0,trig=0>)
ioapic0: pin 3 attached to isa0 irq 3 (type 0<type=0> flags 0<pol=0,trig=0>)
ioapic0: pin 4 attached to isa0 irq 4 (type 0<type=0> flags 0<pol=0,trig=0>)
ioapic0: pin 5 attached to isa0 irq 5 (type 0<type=0> flags 0<pol=0,trig=0>)
ioapic0: pin 6 attached to isa0 irq 6 (type 0<type=0> flags 0<pol=0,trig=0>)
ioapic0: pin 7 attached to isa0 irq 7 (type 0<type=0> flags 0<pol=0,trig=0>)
ioapic0: pin 8 attached to isa0 irq 8 (type 0<type=0> flags 0<pol=0,trig=0>)
ioapic0: pin 9 attached to isa0 irq 9 (type 0<type=0> flags f<pol=3=Act 
Lo,trig=3=Level>)
ioapic0: pin 10 attached to isa0 irq 10 (type 0<type=0> flags 0<pol=0,trig=0>)
ioapic0: pin 11 attached to isa0 irq 11 (type 0<type=0> flags 0<pol=0,trig=0>)
ioapic0: pin 12 attached to isa0 irq 12 (type 0<type=0> flags 0<pol=0,trig=0>)
ioapic0: pin 13 attached to isa0 irq 13 (type 0<type=0> flags 0<pol=0,trig=0>)
ioapic0: pin 14 attached to isa0 irq 14 (type 0<type=0> flags 0<pol=0,trig=0>)
ioapic0: pin 15 attached to isa0 irq 15 (type 0<type=0> flags 0<pol=0,trig=0>)
ioapic0: pin 18 attached to pci0 device 2 INT_A (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 19 attached to pci0 device 2 INT_B (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 16 attached to pci0 device 2 INT_C (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 17 attached to pci0 device 2 INT_D (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 19 attached to pci0 device 3 INT_A (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 16 attached to pci0 device 3 INT_B (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 17 attached to pci0 device 3 INT_C (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 18 attached to pci0 device 3 INT_D (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 16 attached to pci0 device 4 INT_A (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 17 attached to pci0 device 4 INT_B (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 18 attached to pci0 device 4 INT_C (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 19 attached to pci0 device 4 INT_D (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 17 attached to pci0 device 5 INT_A (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 18 attached to pci0 device 5 INT_B (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 19 attached to pci0 device 5 INT_C (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 16 attached to pci0 device 5 INT_D (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 18 attached to pci0 device 6 INT_A (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 19 attached to pci0 device 6 INT_B (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 16 attached to pci0 device 6 INT_C (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 17 attached to pci0 device 6 INT_D (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 19 attached to pci0 device 7 INT_A (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 16 attached to pci0 device 7 INT_B (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 17 attached to pci0 device 7 INT_C (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 18 attached to pci0 device 7 INT_D (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 17 attached to pci0 device 9 INT_A (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 18 attached to pci0 device 9 INT_B (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 19 attached to pci0 device 9 INT_C (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 16 attached to pci0 device 9 INT_D (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 18 attached to pci0 device 10 INT_A (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 19 attached to pci0 device 10 INT_B (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 16 attached to pci0 device 10 INT_C (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 17 attached to pci0 device 10 INT_D (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 19 attached to pci0 device 11 INT_A (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 16 attached to pci0 device 11 INT_B (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 17 attached to pci0 device 11 INT_C (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 18 attached to pci0 device 11 INT_D (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 16 attached to pci0 device 12 INT_A (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 17 attached to pci0 device 12 INT_B (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 18 attached to pci0 device 12 INT_C (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 19 attached to pci0 device 12 INT_D (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 16 attached to pci0 device 20 INT_A (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 17 attached to pci0 device 20 INT_B (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 18 attached to pci0 device 20 INT_C (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 19 attached to pci0 device 20 INT_D (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 16 attached to pci0 device 18 INT_A (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 17 attached to pci0 device 18 INT_B (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 18 attached to pci0 device 18 INT_C (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 19 attached to pci0 device 18 INT_D (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 18 attached to pci0 device 19 INT_A (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 19 attached to pci0 device 19 INT_B (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 16 attached to pci0 device 19 INT_C (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 17 attached to pci0 device 19 INT_D (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 22 attached to pci0 device 17 INT_A (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 18 attached to pci1 device 0 INT_A (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 19 attached to pci1 device 0 INT_B (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 16 attached to pci1 device 0 INT_C (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 17 attached to pci1 device 0 INT_D (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 20 attached to pci2 device 5 INT_A (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 21 attached to pci2 device 5 INT_B (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 22 attached to pci2 device 5 INT_C (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 23 attached to pci2 device 5 INT_D (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 21 attached to pci2 device 6 INT_A (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 22 attached to pci2 device 6 INT_B (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 23 attached to pci2 device 6 INT_C (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 20 attached to pci2 device 6 INT_D (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 22 attached to pci2 device 7 INT_A (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 23 attached to pci2 device 7 INT_B (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 20 attached to pci2 device 7 INT_C (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: pin 21 attached to pci2 device 7 INT_D (type 0<type=0> flags 
f<pol=3=Act Lo,trig=3=Level>)
ioapic0: int9 1a998<vector=98,delmode=1,logical,actlo,level,masked,dest=0> 
3f000000<target=3f>
acpi0: SCI interrupting at int 9
acpi0: fixed-feature power button present
timecounter: Timecounter "ACPI-Safe" frequency 3579545 Hz quality 900
ACPI-Safe 32-bit timer
pckbc1 at acpi0 (PSKE, PNP0303) (kbd port): io 0x60,0x64 irq 1
pckbc2 at acpi0 (PSMS, PNP0F03) (aux port): irq 12
TMR (PNP0100) [AT Timer] at acpi0 not configured
pcppi0 at acpi0 (SPKR, PNP0800): io 0x61
UAR1 (PNP0501) [16550A-compatible COM port] at acpi0 not configured
HPET (PNP0103) [HPET Timer] at acpi0 not configured
acpibut0 at acpi0 (PWRB, PNP0C0C-170): ACPI Power Button
pci0 at hypervisor0 bus 0: configuration mode 1
hypervisor0: added to list as bus 0
pci0: i/o space, memory space enabled
pchb0 at pci0 dev 0 function 0
pchb0: ATI Technologies product 0x5957 (rev. 0x00)
ppb0 at pci0 dev 6 function 0: ATI Technologies product 0x597c (rev. 0x00)
ppb0: unsupported PCI Express version
pci1 at ppb0 bus 1
ppb0: added to list as bus 1
pci1: i/o space, memory space enabled
re0 at pci1 dev 0 function 0: RealTek 8168/8111 PCIe Gigabit Ethernet (rev. 
0x03)
ioapic0: int18 1a9a0<vector=a0,delmode=1,logical,actlo,level,masked,dest=0> 
3f000000<target=3f>
re0: interrupting at ioapic0 pin 18, event channel 4
re0: Ethernet address 6c:62:6d:7a:aa:52
re0: using 256 tx descriptors
rgephy0 at re0 phy 7: RTL8169S/8110S/8211 1000BASE-T media interface, rev. 2
rgephy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseT, 
1000baseT-FDX, auto
ahcisata0 at pci0 dev 17 function 0: ATI Technologies SB700/SB800 SATA 
Controller (AHCI mode)
ioapic0: int22 1a9a8<vector=a8,delmode=1,logical,actlo,level,masked,dest=0> 
3f000000<target=3f>
ahcisata0: interrupting at ioapic0 pin 22, event channel 5
ahcisata0: AHCI revision 1.1, 6 ports, 32 command slots, features 0xf722e080
atabus0 at ahcisata0 channel 0
atabus1 at ahcisata0 channel 1
atabus2 at ahcisata0 channel 2
atabus3 at ahcisata0 channel 3
atabus4 at ahcisata0 channel 4
atabus5 at ahcisata0 channel 5
ohci0 at pci0 dev 18 function 0: ATI Technologies SB700/SB800 USB OHCI 
Controller (rev. 0x00)
ioapic0: int16 1a9b0<vector=b0,delmode=1,logical,actlo,level,masked,dest=0> 
3f000000<target=3f>
ohci0: interrupting at ioapic0 pin 16, event channel 6
ohci0: OHCI version 1.0, legacy support
usb0 at ohci0: USB revision 1.0
ohci1 at pci0 dev 18 function 1: ATI Technologies SB700/SB800 USB OHCI 
Controller (rev. 0x00)
ohci1: interrupting at ioapic0 pin 16, event channel 6
ohci1: OHCI version 1.0, legacy support
usb1 at ohci1: USB revision 1.0
ehci0 at pci0 dev 18 function 2: ATI Technologies SB700/SB800 USB EHCI 
Controller (rev. 0x00)
ioapic0: int17 1a9b8<vector=b8,delmode=1,logical,actlo,level,masked,dest=0> 
3f000000<target=3f>
ehci0: interrupting at ioapic0 pin 17, event channel 7
ehci0: dropped intr workaround enabled
ehci0: BIOS has given up ownership
ehci0: EHCI version 1.0
ehci0: companion controllers, 3 ports each: ohci0 ohci1
usb2 at ehci0: USB revision 2.0
ohci2 at pci0 dev 19 function 0: ATI Technologies SB700/SB800 USB OHCI 
Controller (rev. 0x00)
ohci2: interrupting at ioapic0 pin 18, event channel 4
ohci2: OHCI version 1.0, legacy support
usb3 at ohci2: USB revision 1.0
ohci3 at pci0 dev 19 function 1: ATI Technologies SB700/SB800 USB OHCI 
Controller (rev. 0x00)
ohci3: interrupting at ioapic0 pin 18, event channel 4
ohci3: OHCI version 1.0, legacy support
usb4 at ohci3: USB revision 1.0
ehci1 at pci0 dev 19 function 2: ATI Technologies SB700/SB800 USB EHCI 
Controller (rev. 0x00)
ioapic0: int19 1a9c0<vector=c0,delmode=1,logical,actlo,level,masked,dest=0> 
3f000000<target=3f>
ehci1: interrupting at ioapic0 pin 19, event channel 8
ehci1: dropped intr workaround enabled
ehci1: BIOS has given up ownership
ehci1: EHCI version 1.0
ehci1: companion controllers, 3 ports each: ohci2 ohci3
usb5 at ehci1: USB revision 2.0
ATI Technologies SB600/SB700/SB800 SMBus Controller (SMBus serial bus, revision 
0x3c) at pci0 dev 20 function 0 not configured
ixpide0 at pci0 dev 20 function 1
ixpide0: ATI Technologies IXP IDE Controller (rev. 0x00)
ixpide0: bus-master DMA support present
ixpide0: primary channel configured to compatibility mode
ioapic0: int14 988<vector=88,delmode=1,logical,dest=0> 3f000000<target=3f>
ixpide0: primary channel interrupting at ioapic0 pin 14, event channel 9
atabus6 at ixpide0 channel 0
ixpide0: secondary channel configured to compatibility mode
ioapic0: int15 990<vector=90,delmode=1,logical,dest=0> 3f000000<target=3f>
ixpide0: secondary channel interrupting at ioapic0 pin 15, event channel 10
atabus7 at ixpide0 channel 1
azalia0 at pci0 dev 20 function 2: Generic High Definition Audio Controller
azalia0: interrupting at ioapic0 pin 16, event channel 6
azalia0: host: ATI Technologies SB600 Azalia (rev. 0), HDA rev. 1.0
pcib0 at pci0 dev 20 function 3
pcib0: ATI Technologies SB700/SB800 LPC Host Controller (rev. 0x00)
ppb1 at pci0 dev 20 function 4: ATI Technologies SB600 PCI to PCI Bridge (rev. 
0x00)
pci2 at ppb1 bus 2
ppb1: added to list as bus 2
pci2: i/o space, memory space enabled
puc0 at pci2 dev 5 function 0: NetMos NM9845 6 UART (com, com, com, com, com, 
com)
ioapic0: int20 1a9c8<vector=c8,delmode=1,logical,actlo,level,masked,dest=0> 
3f000000<target=3f>
com2 at puc0 port 0: interrupting at ioapic0 pin 20, event channel 11
com2: ns16550a, working fifo
com3 at puc0 port 1: interrupting at ioapic0 pin 20, event channel 11
com3: ns16550a, working fifo
com4 at puc0 port 2: interrupting at ioapic0 pin 20, event channel 11
com4: ns16550a, working fifo
com5 at puc0 port 3: interrupting at ioapic0 pin 20, event channel 11
com5: ns16550a, working fifo
com6 at puc0 port 4: interrupting at ioapic0 pin 20, event channel 11
com6: ns16550a, working fifo
com7 at puc0 port 5: interrupting at ioapic0 pin 20, event channel 11
com7: ns16550a, working fifo
ppb2 at pci2 dev 6 function 0: Digital Equipment DC21152 PCI-PCI Bridge (rev. 
0x03)
pci3 at ppb2 bus 3
ppb2: added to list as bus 3
pci3: i/o space, memory space enabled
tlp0 at pci3 dev 4 function 0: DECchip 21143 Ethernet, pass 4.1
tlp0: QS6611 PHY
ioapic0: int21 1a9d0<vector=d0,delmode=1,logical,actlo,level,masked,dest=0> 
3f000000<target=3f>
tlp0: interrupting at ioapic0 pin 21, event channel 12
tlp0: Ethernet address 00:c0:95:e0:e7:d0
tlp0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
tlp1 at pci3 dev 5 function 0: DECchip 21143 Ethernet, pass 4.1
tlp1: QS6611 PHY
tlp1: interrupting at ioapic0 pin 22, event channel 5
tlp1: Ethernet address 00:c0:95:e0:e7:d1
tlp1: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
tlp2 at pci3 dev 6 function 0: DECchip 21143 Ethernet, pass 4.1
tlp2: QS6611 PHY
ioapic0: int23 1a9d8<vector=d8,delmode=1,logical,actlo,level,masked,dest=0> 
3f000000<target=3f>
tlp2: interrupting at ioapic0 pin 23, event channel 13
tlp2: Ethernet address 00:c0:95:e0:e7:d2
tlp2: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
tlp3 at pci3 dev 7 function 0: DECchip 21143 Ethernet, pass 4.1
tlp3: QS6611 PHY
tlp3: interrupting at ioapic0 pin 20, event channel 11
tlp3: Ethernet address 00:c0:95:e0:e7:d3
tlp3: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
vga0 at pci2 dev 7 function 0: S3 Trio32/64 (rev. 0x00)
wsdisplay0 at vga0 kbdmux 1
wsmux1: connecting to wsdisplay0
drm at vga0 not configured
ohci4 at pci0 dev 20 function 5: ATI Technologies SB700/SB800 USB OHCI 
Controller (rev. 0x00)
ohci4: interrupting at ioapic0 pin 18, event channel 4
ohci4: OHCI version 1.0, legacy support
usb6 at ohci4: USB revision 1.0
pchb1 at pci0 dev 24 function 0
pchb1: Advanced Micro Devices AMD64 Family10h HyperTransport configuration 
(rev. 0x00)
pchb2 at pci0 dev 24 function 1
pchb2: Advanced Micro Devices AMD64 Family10h Address Map configuration (rev. 
0x00)
pchb3 at pci0 dev 24 function 2
pchb3: Advanced Micro Devices AMD64 Family10h DRAM configuration (rev. 0x00)
amdtemp0 at pci0 dev 24 function 3
amdtemp0: AMD CPU Temperature Sensors (Family10h / Family11h)
pchb4 at pci0 dev 24 function 4
pchb4: Advanced Micro Devices AMD64 Family10h Link configuration (rev. 0x00)
isa0 at pcib0
timecounter: Timecounter "clockinterrupt" frequency 100 Hz quality 0
Xen clock: using event channel 14
timecounter: Timecounter "xen_system_time" frequency 1000000000 Hz quality 10000
xenbus0: using event channel 15
azalia0: codec[3]: 0x10ec/0x0889 (rev. 0.4), HDA rev. 1.0
audio0 at azalia0: full duplex, playback, capture, independent
uhub0 at usb0: ATI Technologie OHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub0: 3 ports with 3 removable, self powered
uhub1 at usb1: ATI Technologie OHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub1: 3 ports with 3 removable, self powered
uhub2 at usb2: ATI Technologies EHCI root hub, class 9/0, rev 2.00/1.00, addr 1
uhub2: 6 ports with 6 removable, self powered
uhub3 at usb3: ATI Technologie OHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub3: 3 ports with 3 removable, self powered
uhub4 at usb4: ATI Technologie OHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub4: 3 ports with 3 removable, self powered
uhub5 at usb5: ATI Technologies EHCI root hub, class 9/0, rev 2.00/1.00, addr 1
uhub5: 6 ports with 6 removable, self powered
ahcisata0 port 0: device present, speed: 3.0Gb/s
ahcisata0 port 1: device present, speed: 3.0Gb/s
uhub6 at usb6: ATI Technologie OHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub6: 2 ports with 2 removable, self powered
wd0 at atabus0 drive 0: <SAMSUNG HD502HI>
wd0: drive supports 16-sector PIO transfers, LBA48 addressing
wd0: 465 GB, 969021 cyl, 16 head, 63 sec, 512 bytes/sect x 976773168 sectors
wd0: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 7
wd0(ahcisata0:0:0): using PIO mode 4, DMA mode 2, Ultra-DMA mode 6 (Ultra/133) 
(using DMA)
wd1 at atabus1 drive 0: <SAMSUNG HD502HI>
wd1: drive supports 16-sector PIO transfers, LBA48 addressing
wd1: 465 GB, 969021 cyl, 16 head, 63 sec, 512 bytes/sect x 976773168 sectors
wd1: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 7
wd1(ahcisata0:1:0): using PIO mode 4, DMA mode 2, Ultra-DMA mode 6 (Ultra/133) 
(using DMA)
Kernelized RAIDframe activated
raid0: RAID Level 1
raid0: Components: /dev/wd0a /dev/wd1a
raid0: Total Sectors: 976772992 (476939 MB)
boot device: raid0
root on raid0a dumps on raid0b
root file system type: ffs
wsdisplay0: screen 1 added (80x25, vt100 emulation)
wsdisplay0: screen 2 added (80x25, vt100 emulation)
wsdisplay0: screen 3 added (80x25, vt100 emulation)
wsdisplay0: screen 4 added (80x25, vt100 emulation)
xvif1.0: Ethernet address 00:16:3e:19:1b:91
xvif1.1: Ethernet address 00:16:3e:71:59:36
xbd backend: attach device vnd0d (size 16777216) for domain 1
tap0: Ethernet address f2:0b:a4:7b:c7:0c
tap1: Ethernet address f2:0b:a4:7b:c7:0c
xbd backend 0x300 for domain 1 using event channel 20, protocol x86_64-abi
-----

Xen dmesg:
-----
 __  __            _____  _____  ____  
 \ \/ /___ _ __   |___ / |___ / |___ \ 
  \  // _ \ \047_ \    |_ \   |_ \   __) |
  /  \  __/ | | |  ___) | ___) | / __/ 
 /_/\_\___|_| |_| |____(_)____(_)_____|
                                       
(XEN) Xen version 3.3.2 (root%eldamar.org.uk@localhost) (gcc version 4.1.3 
20080704 prerelease (NetBSD nb2 20081120)) Sat Dec  4 01:06:23 GMT 2010
(XEN) Latest ChangeSet: unavailable
(XEN) Command line: dom0_mem=256M console=com1 com1=9600,8n1
(XEN) Video information:
(XEN)  VGA is text mode 80x25, font 8x16
(XEN) Disc information:
(XEN)  Found 2 MBR signatures
(XEN)  Found 2 EDD information structures
(XEN) Xen-e820 RAM map:
(XEN)  0000000000000000 - 000000000009fc00 (usable)
(XEN)  000000000009fc00 - 00000000000a0000 (reserved)
(XEN)  00000000000e6000 - 0000000000100000 (reserved)
(XEN)  0000000000100000 - 00000000dfe90000 (usable)
(XEN)  00000000dfe90000 - 00000000dfe9e000 (ACPI data)
(XEN)  00000000dfe9e000 - 00000000dfee0000 (ACPI NVS)
(XEN)  00000000dfee0000 - 00000000dff00000 (reserved)
(XEN)  00000000fff00000 - 0000000100000000 (reserved)
(XEN)  0000000100000000 - 0000000420000000 (usable)
(XEN) System RAM: 16382MB (16775356kB)
(XEN) ACPI: RSDP 000FAAB0, 0014 (r0 ACPIAM)
(XEN) ACPI: RSDT DFE90000, 0040 (r1 7599MS A7599100 20100804 MSFT       97)
(XEN) ACPI: FACP DFE90200, 0084 (r1 7599MS A7599100 20100804 MSFT       97)
(XEN) ACPI Warning (tbfadt-0444): Optional field "Pm2ControlBlock" has zero 
address or length: 0000000000000000/1 [20070126]
(XEN) ACPI: DSDT DFE905D0, 98F4 (r1  A7599 A7599100      100 INTL 20051117)
(XEN) ACPI: FACS DFE9E000, 0040
(XEN) ACPI: APIC DFE90390, 007C (r1 7599MS A7599100 20100804 MSFT       97)
(XEN) ACPI: MCFG DFE90410, 003C (r1 7599MS OEMMCFG  20100804 MSFT       97)
(XEN) ACPI: OEMB DFE9E040, 0072 (r1 7599MS A7599100 20100804 MSFT       97)
(XEN) ACPI: SRAT DFE99ED0, 0108 (r3 AMD    FAM_F_10        2 AMD         1)
(XEN) ACPI: HPET DFE99FE0, 0038 (r1 7599MS OEMHPET  20100804 MSFT       97)
(XEN) ACPI: SSDT DFE9A020, 0DA4 (r1 A M I  POWERNOW        1 AMD         1)
(XEN) Xen heap: 14MB (14360kB)
(XEN) Domain heap initialised
(XEN) Processor #0 0:10 APIC version 16
(XEN) Processor #1 0:10 APIC version 16
(XEN) Processor #2 0:10 APIC version 16
(XEN) Processor #3 0:10 APIC version 16
(XEN) Processor #4 0:10 APIC version 16
(XEN) Processor #5 0:10 APIC version 16
(XEN) IOAPIC[0]: apic_id 6, version 33, address 0xfec00000, GSI 0-23
(XEN) Enabling APIC mode:  Flat.  Using 1 I/O APICs
(XEN) Using scheduler: SMP Credit Scheduler (credit)
(XEN) Detected 2807.113 MHz processor.
(XEN) AMD SVM: ASIDs enabled. 
(XEN) HVM: SVM enabled
(XEN) HVM: Hardware Assisted Paging detected.
(XEN) CPU0: AMD Family10h machine check reporting enabled.
(XEN) CPU0: AMD Phenom(tm) II X6 1055T Processor stepping 00
(XEN) Booting processor 1/1 eip 8c000
(XEN) AMD SVM: ASIDs enabled. 
(XEN) CPU1: AMD Family10h machine check reporting enabled.
(XEN) CPU1: AMD Phenom(tm) II X6 1055T Processor stepping 00
(XEN) Booting processor 2/2 eip 8c000
(XEN) AMD SVM: ASIDs enabled. 
(XEN) CPU2: AMD Family10h machine check reporting enabled.
(XEN) CPU2: AMD Phenom(tm) II X6 1055T Processor stepping 00
(XEN) Booting processor 3/3 eip 8c000
(XEN) AMD SVM: ASIDs enabled. 
(XEN) CPU3: AMD Family10h machine check reporting enabled.
(XEN) CPU3: AMD Phenom(tm) II X6 1055T Processor stepping 00
(XEN) Booting processor 4/4 eip 8c000
(XEN) AMD SVM: ASIDs enabled. 
(XEN) CPU4: AMD Family10h machine check reporting enabled.
(XEN) CPU4: AMD Phenom(tm) II X6 1055T Processor stepping 00
(XEN) Booting processor 5/5 eip 8c000
(XEN) AMD SVM: ASIDs enabled. 
(XEN) CPU5: AMD Family10h machine check reporting enabled.
(XEN) CPU5: AMD Phenom(tm) II X6 1055T Processor stepping 00
(XEN) Total of 6 processors activated.
(XEN) ENABLING IO-APIC IRQs
(XEN)  -> Using new ACK method
(XEN) checking TSC synchronization across 6 CPUs: passed.
(XEN) Platform timer is 14.318MHz HPET
(XEN) Brought up 6 CPUs
(XEN) I/O virtualisation disabled
(XEN) *** LOADING DOMAIN 0 ***
(XEN)  Xen  kernel: 64-bit, lsb, compat32
(XEN)  Dom0 kernel: 64-bit, lsb, paddr 0xffffffff80100000 -> 0xffffffff806f7a60
(XEN)  Dom0 symbol map 0xffffffff806f7a60 -> 0xffffffff8078b700
(XEN) PHYSICAL MEMORY ARRANGEMENT:
(XEN)  Dom0 alloc.:   0000000411000000->0000000412000000 (61440 pages to be 
allocated)
(XEN) VIRTUAL MEMORY ARRANGEMENT:
(XEN)  Loaded kernel: ffffffff80100000->ffffffff8078b700
(XEN)  Init. ramdisk: ffffffff8078c000->ffffffff8078c000
(XEN)  Phys-Mach map: ffffffff8078c000->ffffffff8080c000
(XEN)  Start info:    ffffffff8080c000->ffffffff8080c4a4
(XEN)  Page tables:   ffffffff8080d000->ffffffff80816000
(XEN)  Boot stack:    ffffffff80816000->ffffffff80817000
(XEN)  TOTAL:         ffffffff80000000->ffffffff80c00000
(XEN)  ENTRY ADDRESS: ffffffff80100000
(XEN) Dom0 has maximum 6 VCPUs
(XEN) Scrubbing Free RAM: 
...............................................................................................................................................................done.
(XEN) Xen trace buffers: disabled
(XEN) Std. Loglevel: Errors and warnings
(XEN) Guest Loglevel: Nothing (Rate-limited: Errors and warnings)
(XEN) *** Serial input -> DOM0 (type \047CTRL-a\047 three times to switch input 
to Xen)
(XEN) Freed 104kB init memory.
(XEN) ioapic_guest_write: apic=0, pin=2, old_irq=0, new_irq=-1
(XEN) ioapic_guest_write: old_entry=000009f0, new_entry=00010900
(XEN) ioapic_guest_write: Attempt to remove IO-APIC pin of in-use IRQ!
(XEN) ioapic_guest_write: apic=0, pin=4, old_irq=4, new_irq=-1
(XEN) ioapic_guest_write: old_entry=000009f1, new_entry=00010900
(XEN) ioapic_guest_write: Attempt to remove IO-APIC pin of in-use IRQ!
-----


Alex
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